jackson通用解析json方法

package com.util;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.google.common.collect.Lists;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/** * json 解析类，通用于全项目 *

* Created by 刘一波 on 15/7/24. * E-Mail:zhanlanstar@163.com */
@Slf4j
public class JsonUtils {
private static ObjectMapper objectMapper = new ObjectMapper();
static {
objectMapper.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);
objectMapper.configure(SerializationFeature.INDENT_OUTPUT, true);
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
objectMapper.setDateFormat(sdf);
}
/** * 提供给elasticsearch使用，把bean转换成list map 集合类型，否则不能存入索引 * * @param o * @return */
public static Object beanToJsonObject(Object o) {
return jsonStrToList(objectToJsonStr(o), Map.class);
}
public static String objectToJsonStr(Object o) {
try {
return objectMapper.writeValueAsString(o);
} catch (IOException e) {
log.error("object can not objectTranslate to json", e);
}
return null;
}
public static T jsonStrToObject(String json, Class cls) {
try {
return objectMapper.readValue(json, cls);
} catch (IOException e) {
log.error("json cant be objectTranslate to object", e);
return null;
}
}
public static T jsonDataToObject(String jsonStr, Class cls) {
if (!StringUtils.isEmpty(jsonStr)) {
T data = JsonUtils.jsonStrToObject(jsonStr, cls);
return data;
} else {
return null;
}
}
public static List jsonStrToList(String jsonStr, Class clazz) {
List list = Lists.newArrayList();
try {
// 指定容器结构和类型（这里是ArrayList和clazz）
TypeFactory t = TypeFactory.defaultInstance();
list = objectMapper.readValue(jsonStr,
t.constructCollectionType(ArrayList.class, clazz));
} catch (IOException e) {
log.error("反序列化序列化attributes，从Json到List报错", e);
}
return list;
}
public static Map jsonStrToMap(String attributes) {
try {
return objectMapper.readValue(attributes, HashMap.class);
} catch (IOException e) {
log.error("反序列化序列化attributes，从Json到HashMap报错", e);
}
return new HashMap();
}
}